<template>
  <div class="list" ref="wrapper">
  <div>
    <div class="area">
     <div class="title">当前城市</div>
     <div class="button-list">
       <div class="button-wrapper">
        <div class="button">{{this.currentCity}}</div>
       </div>
     </div>
    </div>
   <div class="area">
      <div class="title border-topbottom">热门城市</div>
      <div class="button-list">
       <div class="button-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
            >
         <div class="button">{{item.name}}</div>
       </div>
       </div>
   </div>
   <div class="area"
        v-for="(item, key) of cities"
        :key="key"
        :ref="key"
  >
      <div class="title border-topbottom">{{key}}</div>
      <div class="item-list">
        <div class="item border-bottom"
          v-for="innerItem of item"
          :key="innerItem.id"
          @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
        </div>
      </div>
   </div>
   </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.$nextTick(function () {
      const options = {
        click: true,
        tap: true
      }
      this.scroll = new Bscroll(this.$refs.wrapper, options) /**/
    })
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color #cccccc
    &:after
      border-color #cccccc
  .border-bottom
    &:before
      border-color #cccccc
  .list
    overflow hidden
    position absolute
    left 0
    right 0
    top 1.58rem
    bottom 0
  .title
    line-height .54rem
    background-color #eeeeee
    padding-left .1rem
    color #666666
    font-size .26rem
  .button-list
    overflow hidden
    padding .1rem .6rem .1rem .1rem
    .button-wrapper
      float left
      width 33.33%
      .button
        text-align center
        margin .1rem .1rem
        border .02rem solid #cccccc
        padding .1rem 0
        border-radius .06rem
  .item-list
    .item
      line-height .76rem
      padding-left .1rem
</style>
